Title:
LASER STRAIN GAGE
Document Type and Number:
Japanese Patent JP2560260
Kind Code:
B2
Abstract:
PURPOSE: To provide a laser strain gage which has high resolution, is durable against high-temperature environment, and has easy installation and handling.
CONSTITUTION: The laser strain gage comprises a plurality of resonators for sensors of multiple reflection interferometer having a pair of concave mirrors 8 fixed to an inner wall at different angles of optical axes in the radial direction of a vessel 1, and a reference resonator of multiple reflection interferometer installed near the resonators and having a pair of concave mirrors 12 fixed at a predetermined interval. A laser light of a resonance frequency is guided from a laser oscillator via an optical fiber 3 to the respective resonators, a distance change between the mirrors is obtained from the difference between the resonance frequencies of the resonators and the reference resonator, and the strain change of a medium embedded with the vessel 1 is observed.
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Inventors:
SAKATA MASAHARU
Application Number:
JP26439894A
Publication Date:
December 04, 1996
Filing Date:
October 05, 1994
Export Citation:
Assignee:
KAGAKU GIJUTSUCHO BOSAI KAGAKU
International Classes:
G01B11/16; G01L5/00; (IPC1-7): G01B11/16; G01L5/00
Domestic Patent References:
| JP694425A | ||||
| JP251004A | ||||
| JP5868606A | ||||
| JP63274805A | ||||
| JP4276505A |